210100111121021 has 8 divisors (see below), whose sum is σ = 229205986737600. Its totient is φ = 190995213090240.

The previous prime is 210100111120979. The next prime is 210100111121029. The reversal of 210100111121021 is 120121111001012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210100111121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100111120987 and 210100111121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100111121029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243947036 + ... + 244806773.

It is an arithmetic number, because the mean of its divisors is an integer number (28650748342200).

Almost surely, 2^{210100111121021} is an apocalyptic number.

It is an amenable number.

210100111121021 is a deficient number, since it is larger than the sum of its proper divisors (19105875616579).

210100111121021 is a wasteful number, since it uses less digits than its factorization.

210100111121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488792899.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210100111121021 its reverse (120121111001012), we get a palindrome (330221222122033).

The spelling of 210100111121021 in words is "two hundred ten trillion, one hundred billion, one hundred eleven million, one hundred twenty-one thousand, twenty-one".